JPH066448A - Device for preventing mischievous phone call - Google Patents

Abstract

PURPOSE:To provide an inexpensive mischievous phone call prevention device with simple structure. CONSTITUTION:The device is provided with a 2/4-wire converter T and a switch selecting whether or not a 1st terminal of the 2/4-wire converter T is connected to a telephone line L1. Furthermore, a delay device DL is interposed between 2nd and 3rd terminals of the 2/4-wire converter T. When the 1st terminal of the 2/4-wire converter T is connected to the telephone line L1 via the switch, a voice signal from a talking opposite party is delayed by the delay device DL and returned to the talking opposite party.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prank call prevention device which is not suitable for use when answering a prank call.

[0002]

2. Description of the Related Art Conventionally, a telephone having a prank call answering function has been known. According to this type of telephone, when a prank call is received, the prank call answering function is activated by the operation of the operator by the user, and the voice stored in advance in the phone is pronounced and sent to the other party. . This voice is, for example, a sound that causes discomfort to the human ear, or a voice that has a content that threatens the other party, and is expected to have the effect of disturbing the talker who hears this voice to continue the call. Is.

[0003]

By the way, the conventional prank call prevention device described above requires a recording / playback function or a sound source module for generating an unpleasant sound or a sound threatening the other party. Therefore, there is a drawback that the structure of the telephone device becomes complicated and becomes expensive. The present invention has been made under such a background, and an object of the present invention is to provide a prank call preventing device having a simple structure and inexpensive.

[0004]

A prank call prevention device according to the present invention includes first to third terminals, and
A two-wire to four-wire converter that outputs to the second terminal a reception signal received from the terminal and outputs a transmission signal supplied to the third terminal to the first terminal; A delay device for delaying a reception signal output from the terminal of the third terminal for a predetermined time and supplying the reception signal as the transmission signal to the third terminal;
And a switch for switching whether or not the terminal is connected to the telephone line.

[0005]

According to the above construction, when the telephone line is connected to the first terminal of the 2-wire to 4-wire converter by the switch, the first terminal
Received signal from the other party is received at the terminal of. This reception signal is output to the second terminal, delayed by the delay device for a predetermined time, and supplied to the third terminal as a transmission signal.
Then, the transmission signal is output from the third terminal of the 2-wire 4-wire converter to the first terminal, and is returned to the other party via the telephone line.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a basic configuration example of a basic unit BU of a prank call prevention device according to an embodiment of the present invention. The figure shows a state in which the basic unit BU is connected to the telephone line L1. T is a two-wire to four-wire converter that outputs a reception signal received from the telephone line L1 to the signal line L2 and outputs a transmission signal supplied via the signal line L3 to the telephone line L1. The 2-wire / 4-wire converter is composed of a transformer, an electronic circuit, or the like. DL is a delay device, which delays the reception signal received via the 2-wire 4-wire converter T for a predetermined time, and outputs the 2-wire 4 as the transmission signal.
Return to the line converter T. The delay device DL is, for example, an electronic circuit,
It is composed of a magnetic recording device, a mechanical delay device, and the like. TIME is a delay time adjusting device, and adjusts the delay time of the delay device DL according to the state of an operator (not shown).

Each embodiment using the basic unit BU having such a structure will be described below. <First Embodiment> FIG. 2 is a block diagram showing the construction of a telephone having the above-mentioned basic unit BU incorporated therein. T
EL 'is the handset of the telephone. SW is a switch for switching the connection destination of the telephone line L1 to either the handset TEL 'or the basic unit BU. First, when a calling signal arrives at this telephone through the telephone line L1 and the user lifts the handset TEL ', this telephone is connected to the telephone of the other party. Along with this, the switch SW is switched to the handset TEL 'side.
In this state, the user can have a conversation with the other party. When a prank call prevention function button (not shown) provided on this telephone is pressed, the switch SW is switched to the basic unit BU side. As a result, the handset TEL 'is disconnected from the telephone line L1.
The basic unit BU is connected to the telephone line L1. In this state, the voice of the other party arriving via the telephone line is delayed for a predetermined time by passing through the route of the 2-wire 4-wire converter T → the delay device DL → 2-wire 4-wire converter T, and then again. Returned to the other party via the telephone line. Here, for example, when the operator of the delay device described above is set to 1 second,
The other party's words are sent back as is with a delay of 1 second. Generally, when a person speaks his / her voice with such a delay, the person who speaks does not speak well and becomes difficult to speak. Therefore, it is possible to discourage the callee from continuing the call.

<Second Embodiment> FIG. 3 is a block diagram showing a configuration example in the case where the above-mentioned basic unit BU is used as an accessory device separate from an ordinary telephone. TEL is a normal telephone. BU 'is an accessory device including a switch SWa and a basic unit BU. DI is a distributor, which connects the telephone line L1 to the telephone TEL and the auxiliary device BU '.
Connect with. When making a normal call, the user switches the switch SWa to the call side and disconnects the basic unit BU from the distributor DI. On the other hand, if you receive a prank call,
The user switches the switch SWa to the delay side. As a result, the communication partner's words are delayed by the basic unit BU and returned to the communication partner again.

<Third Embodiment> FIG. 4 shows a third embodiment of the present invention. In the figure, accessory device BU '
Is inserted in the middle of the telephone line L1. Also, switch S
Wa is set on the call side during a normal call, and is set on the delay side when performing a prank call prevention operation. Also in this embodiment, the same effect as that of each of the above embodiments can be obtained.

In each of the above embodiments, the delay device DL
When the delay time of is changed at an unspecified period,
It is even more effective.

[0011]

As described above, according to the present invention,
There is an effect that it is possible to supply an inexpensive prank call prevention device that has a simple configuration that does not require a sound source or the like.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration example of a prank call prevention device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a third exemplary embodiment of the present invention.

[Explanation of symbols]

 L1 ... telephone line, L2 ... signal line, L3 ... signal line, T ... 2-wire to 4-wire converter, DL ... delay device, TIME ... delay time adjusting device, BU ... basic unit

Claims (1)

[Claims] 1. A transmission signal having first to third terminals, outputting a reception signal received from the first terminal to the second terminal, and transmitting a transmission signal supplied to the third terminal. A two-wire to four-wire converter that outputs to the first terminal; a delay device that delays a reception signal output from the second terminal for a predetermined time and supplies the reception signal as the transmission signal to the third terminal; And a switch for switching whether or not to connect the first terminal to a telephone line.